Synthesis, characterization and photocatalytic properties of iron-doped titania semiconductors prepared from TiO2 and iron(III) acetylacetonate

J.A. NAVÍO; G. COLÓN; G.N. BIANCO; M.I. LITTER

JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL

ELSEVIER SCIENCE BV

Lugar: Amsterdam; Año: 1996 vol. 106 p. 267 - 276

1381-1169

Specimens of iron-doped titania containing different amounts of Fe (OS-S%) were prepared from TiO, (Degussa P-25) and Fe(III) acetylacetonate. by the wet impregnation method. Samples were characterized by X-ray diffraction analysis, specific surface area (BET) measurements, SEM-EDX, atomic absorption and IR and diffuse reflectance spectra. From the structural point of view, the samples were similar to those obtained with Fe(NO,), . 9H,O as the precursor, but with a more homogeneous distribution of iron for each mixed oxide sample on the particle surfaces but not between particles. The photocatalytic activity of these samples under near-UV irradiation was better for oxalic acid degradation than for EDTA, and similar for both types of mixed oxide samples. Mixed oxides showed however lower activity than TiO,. Some photodegradation under visible irradiation, not occurring with TiO,, could be observed for oxalic acid when using 5% Fe-containing samples.